Method and apparatus for replacing target zones in a video sequence
US6181345A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1998 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/272
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The method for replacing a target billboard in the frames of a video sequence is usable while the billboard undergoes changes of position in the scene. Assuming that the speed of change is constant, a global transformation from a reference image stored in memory is predicted. A modified image is generated by applying the transformation to the reference image and the prediction is adjusted by a global analysis of the image. Then the representation of the billboard is recovered from its color, and its boundaries are extracted by segmentation. The representation of the billboard is substituted by the representation of the model, after the model is warped by a transformation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.